Vaurien is a French word that translates to rascal or scoundrel in English. There are several synonyms to describe a person who is mischievous, dishonest or unscrupulous. Some of these include rogue, knave, villain, blackguard, reprobate, scamp, rapscallion, scallywag, ne'er-do-well, and cad. These words can be used to describe a variety of situations such as a person who cheats, lies, or steals. The key feature of these words is that they all imply moral or ethical deficiencies. These are all words that should be used judiciously, as the wrong use can result in misinterpretation and unintended offence.